31234031391 has 32 divisors (see below), whose sum is σ = 45331280640. Its totient is φ = 19065556224.

The previous prime is 31234031357. The next prime is 31234031399. The reversal of 31234031391 is 19313043213.

It is not a de Polignac number, because 31234031391 - 2⁹ = 31234030879 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31234031399) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 125251 + ... + 279563.

It is an arithmetic number, because the mean of its divisors is an integer number (1416602520).

Almost surely, 2^31234031391 is an apocalyptic number.

31234031391 is a deficient number, since it is larger than the sum of its proper divisors (14097249249).

31234031391 is a wasteful number, since it uses less digits than its factorization.

31234031391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154455.

The product of its (nonzero) digits is 5832, while the sum is 30.

The spelling of 31234031391 in words is "thirty-one billion, two hundred thirty-four million, thirty-one thousand, three hundred ninety-one".